XTR-8856 Hub Cap (Replaces 4009)

The Xtractor™ XTR-8856 is built for trailer axle applications where uptime, oil life, and contamination control are mission-critical. This model features the industry’s only integrated 3-Stage Magnetic Oil Filtration system, which extracts fine metal and particulate debris from the oil bath to safeguard bearings and seals.

Its premium aluminum body makes it ideal for high-mileage operations. Unlike traditional hub caps that require full removal to inspect, the XTR-8856’s HexThread™ access cap allows for fast, clean servicing. An ultra-clear sight window shows oil fill levels at a glance.

Tech Specs:

• Axle Position: Trailer Axle
• Number of Bolt Holes: 6
• Bolt Circle Diameter: 5.500–5.562 in
• Flange Outer Diameter: 6.250 in
• Cross Reference: Stemco 4009, SKF 1643, 1743, 1843, & National 340-009

• HexThread™ Front Access Cartridge for simplified hub oil service
• Built-in multi-stage magnetic filter to remove ferrous & fine particulates
• Ultra-clear sight glass with oil fill level indicator
• Vented rubber plug to regulate pressure, keeping oil in and contaminants out
• Premium aluminum alloy for ultimate durability and corrosion resistance